long s;
__declspec(naked) long __stdcall atomic_postdecrement_up(long volatile * )
{
__asm
{
mov eax, -1
mov ecx, dword ptr [esp + 4]
mov dword ptr [s], ecx
xadd dword ptr [ecx], eax
// Since this is post-decrement, we need do nothing, since the previous
// value is in eax
ret 4
}
}
#include <stdio.h>
int main()
{
for(long i = 0, j = 10; i < 10; ++i)
{
int k;
k = atomic_postdecrement_up(&j);
printf("0x%08x\t0x%08x\n", (unsigned long)&j, s);
printf("%d, %d, %d\n", i, j, k);
}
return 0;
}
posted on 2008-03-06 15:09
RUI 阅读(404)
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